On page 154 on table 6-1, Earth Stance is listed as having the following mechanical benefit:
QuoteWhen other characters make Attack action checks and Scheme action checks that target you, they cannot spend [Opportunity] to inflict critical strikes, conditions, or persistent effects on you.
While I have yet to actually put this system to the table, this FEELS like it is a little too powerful. I personally feel that it should be similar to the Air Stance, where you improve your defenses slightly but do not make it impossible. My version would be: Earth Stance - Increase the cost of spending [Opportunity] to inflict critical strikes, conditions, and persistent effects on you by 1 [Opportunity] (Possibly 2 [Opportunity] if 1 isn't expensive enough).
Does anyone have any table experience one way or another on this?